脂肪醇聚氧乙烯醚的高温气相色谱法分析

 采用 SE-3 0键合甲基硅酮固定相涂铝石英高温毛细管色谱柱、程序升温、FID检测 ,较好地分离了各种合成及天然脂肪醇聚氧乙烯醚 (AEO)样品中的各组分 ;使用 GC-MS进行了样品中组分的定性 ,并经试验研究采用峰面积归一法进行了组分的定量 ,成功地测定了各种 AEO样品中游离脂肪醇质量分数及聚氧乙烯醚的环氧乙烷 (EO)加成数分布。方法简便、快速 ,有较好的准确度和精密度。

Determination of Alkyl Alcohol Polyoxyethylene Ether by High Temperature Gas Chromatography

High temperature GC method has been developed for the separation and determination of alkyl alcohol polyoxyethylene ether (AEO). These AEO samples were separated on high temperature Al-coated fused-silica capillary column (0.1 micron bonded methyl silicon stationary phase, 25 m x 0.25 mm i.d.). The components of AEO sample were identified by GC/MS. The free alkyl alcohol and ethoxymer distribution of polyoxyethylene of AEO sample were determined by normalization method. The FID responses of typical components of AEO sample were determined, and their relative deviations were less than 4.1%. The recoveries of the free alkyl alcohol ranged from 96.5% to 98.1%. The relative standard deviations were less than 1.9%. In comparing with previous methods, this method is simple, fast and more reproducible.